One problem related to brake fluid leak has been reported for the 2011 Lincoln MKZ. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Lincoln MKZ based on all problems reported for the 2011 MKZ.
I started my car and pressed the pedal to shift into reverse and started to back up from a parking spot. The pedal suddenly went to the floor and the car kept moving, pulled the emergency brake. Had warning lcd icons in red about brakes. Tried shutting car off and restarting to see if condition changed, no change, pedal went to floor and no pressure. Checked for leaks under car and no leaks of brake fluid were present. As I could build pressure slowly and had the ebrake, I drove slowly to the nearest dealer. While driving other messages came on to service advance trak and the yellow wrench. Pedal would make contact with brakes at the very lowest point or by pumping brakes otherwise I would have not driven to the nearby dealer. I could have gotten into a serious accident had this happened at higher speeds than backing out of a spot because its so sudden and your stopping distance is greatly affected even with something so slow as adjusting a parking job. Car had around 96,140 miles when it happened. This is a very dangerous condition as even at low speeds I needed a large distance to stop safely before cars in front of me. Car is at the dealer and was just quoted 1,100 dollars but this does seem to be the same issue I read about for previous years recalls and should be investigated.